X-ray marker



FIG. 1 is a perspective view of an X-ray marker showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a rear view thereof.

The broken lines in FIG. 1 and FIG. 2 are included for the purpose of illustrating a portion of the X-ray marker that forms no part of the claimed design. 

The ornamental design for an X-ray marker, as shown and described. 